While Twitter, YouTube, and Slack have begun to roll out dark modes built right into their mobile applications as optional themes, Facebook and its suite of apps have been trailing behind in this particular trend. Despite any trace of evidence that a dark mode launch for Facebook mobile is imminent, notable software engineer Jane Manchun Wong has discovered that the theme is already buried in the mobile app's code.
Facebook has been left in the dust in terms of dark mode launches for their mobile applications. While platforms like YouTube, Twitter, and Slack all have "night" themes built into their iOS and Android apps, Messenger only gained the functionality in April. Facebook, Instagram, and WhatsApp still lack the battery- and eye-saving option.